537964781 has 4 divisors (see below), whose sum is σ = 538029564. Its totient is φ = 537900000.

The previous prime is 537964771. The next prime is 537964783. The reversal of 537964781 is 187469735.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187469735 = 5 ⋅37493947.

It can be written as a sum of positive squares in 2 ways, for example, as 89965225 + 447999556 = 9485^2 + 21166^2 .

It is a cyclic number.

It is not a de Polignac number, because 537964781 - 2⁶ = 537964717 is a prime.

It is a super-2 number, since 2×537964781² = 578812211192755922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537964783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17720 + ... + 37281.

It is an arithmetic number, because the mean of its divisors is an integer number (134507391).

Almost surely, 2^537964781 is an apocalyptic number.

It is an amenable number.

537964781 is a deficient number, since it is larger than the sum of its proper divisors (64783).

537964781 is an equidigital number, since it uses as much as digits as its factorization.

537964781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64782.

The product of its digits is 1270080, while the sum is 50.

The square root of 537964781 is about 23194.0677976072. The cubic root of 537964781 is about 813.3009536327.

The spelling of 537964781 in words is "five hundred thirty-seven million, nine hundred sixty-four thousand, seven hundred eighty-one".